//
//  NSString+OIDAnalysis.m
//  EducationOID
//
//  Created by slz on 2017/5/26.
//  Copyright © 2017年 bnsr. All rights reserved.
//

#import "NSString+OIDAnalysis.h"
#include <ifaddrs.h>
#include <arpa/inet.h>
#include <net/if.h>

#define IOS_CELLULAR    @"pdp_ip0"
#define IOS_WIFI        @"en0"
//#define IOS_VPN       @"utun0"
#define IP_ADDR_IPv4    @"ipv4"
#define IP_ADDR_IPv6    @"ipv6"


@implementation NSString (OIDAnalysis)

-(BOOL)isOIDString{
    if ([MFWStringUtils isEmptyString:self]){
        return NO;
    } 
    
    
    return YES;
}

-(NSString *)filterHTML
{
    NSScanner * scanner = [NSScanner scannerWithString:self];
    NSString * text = nil;
    NSString * returnString = self;
    while([scanner isAtEnd]==NO)
    {
        [scanner scanUpToString:@"&" intoString:nil];
     BOOL isEND =  [scanner scanUpToString:@";" intoString:&text];
        if (isEND){
            [scanner scanUpToString:@";" intoString:&text];
        }
        
        returnString = [returnString stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@;",text] withString:@""];
    }
    return returnString;
}

- (NSString *)subStringFrom:(NSString *)startString to:(NSString *)endString{
    
    NSRange startRange = [self rangeOfString:startString];
    NSRange endRange = [self rangeOfString:endString];
    NSRange range = NSMakeRange(startRange.location + startRange.length, endRange.location - startRange.location - startRange.length);
    return [self substringWithRange:range];
    
}

- (BOOL)isContainOID
{
    return [self containsString:@"oid:"];
}

-(BOOL)isContainOidCenter
{
    return ([self containsString:@"http://www.e-oid.org.cn/oid/parse/?oid="] || [self containsString:@"http://oid.jxjyzy.net/jx/parse/?oid="] || [self containsString:@"http://code.ncedu.gov.cn/nc/parse/?oid="]);
}

-(NSString *)getZZwithString:(NSString *)string{
    NSRegularExpression *regularExpretion=[NSRegularExpression regularExpressionWithPattern:@"@[^\\[\\]]+?;"
                                                                                    options:0
                                                                                      error:nil];
    string=[regularExpretion stringByReplacingMatchesInString:string options:NSMatchingReportProgress range:NSMakeRange(0, string.length) withTemplate:@""];
    return string;
}

-(NSString *)getReplacedString{

    NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"@／：；（）¥「」＂、[]{}#%-*+=_\\|~＜＞$€^•'@#$%^&*()_+'\""];
    NSString *trimmedString = [self stringByTrimmingCharactersInSet:set];
    
    return trimmedString;
}

- (BOOL)includeChinese
{
    for(int i=0; i< [self length];i++)
    {
        int a =[self characterAtIndex:i];
        if( a >0x4e00&& a <0x9fff){
            return YES;
        }
    }
    return NO;
}


- (BOOL)isUrl
{
    
    NSString *urlRegex = @"(https?|ftp|file)://[-A-Za-z0-9+&@#/%?=~_|!:,.;]+[-A-Za-z0-9+&@#/%=~_|]";
    NSPredicate* urlTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", urlRegex];
    return [urlTest evaluateWithObject:self];
}


+ (NSString *)getIPAddress:(BOOL)preferIPv4
{
    NSArray *searchArray = preferIPv4 ?
    @[ /*IOS_VPN @"/" IP_ADDR_IPv4, IOS_VPN @"/" IP_ADDR_IPv6,*/ IOS_WIFI @"/" IP_ADDR_IPv4, IOS_WIFI @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6 ] :
    @[ /*IOS_VPN @"/" IP_ADDR_IPv6, IOS_VPN @"/" IP_ADDR_IPv4,*/ IOS_WIFI @"/" IP_ADDR_IPv6, IOS_WIFI @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4 ] ;
    
    NSDictionary *addresses = [self getIPAddresses];
    NSLog(@"addresses: %@", addresses);
    
    __block NSString *address;
    [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)
     {
         address = addresses[key];
         if(address) *stop = YES;
     } ];
    return address ? address : @"0.0.0.0";
}

+ (NSDictionary *)getIPAddresses
{
    NSMutableDictionary *addresses = [NSMutableDictionary dictionaryWithCapacity:8];
    
    // retrieve the current interfaces - returns 0 on success
    struct ifaddrs *interfaces;
    if(!getifaddrs(&interfaces)) {
        // Loop through linked list of interfaces
        struct ifaddrs *interface;
        for(interface=interfaces; interface; interface=interface->ifa_next) {
            if(!(interface->ifa_flags & IFF_UP) /* || (interface->ifa_flags & IFF_LOOPBACK) */ ) {
                continue; // deeply nested code harder to read
            }
            const struct sockaddr_in *addr = (const struct sockaddr_in*)interface->ifa_addr;
            char addrBuf[ MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN) ];
            if(addr && (addr->sin_family==AF_INET || addr->sin_family==AF_INET6)) {
                NSString *name = [NSString stringWithUTF8String:interface->ifa_name];
                NSString *type;
                if(addr->sin_family == AF_INET) {
                    if(inet_ntop(AF_INET, &addr->sin_addr, addrBuf, INET_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv4;
                    }
                } else {
                    const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6*)interface->ifa_addr;
                    if(inet_ntop(AF_INET6, &addr6->sin6_addr, addrBuf, INET6_ADDRSTRLEN)) {
                        type = IP_ADDR_IPv6;
                    }
                }
                if(type) {
                    NSString *key = [NSString stringWithFormat:@"%@/%@", name, type];
                    addresses[key] = [NSString stringWithUTF8String:addrBuf];
                }
            }
        }
        // Free memory
        freeifaddrs(interfaces);
    }
    return [addresses count] ? addresses : nil;
}



@end
